Pressure Relief Valve technology
What is the likelihood that your door opening will withstand excessive pressure? Wind and environmental conditions, abusive users or mobile equipment can often cause excessive pressure when the door is forced open or closed. If this is the case, you need to consider whether or not you want a closer that uses Pressure Relief Valve (PRV) technology. This technology features a built-in valve that relieves excessive pressure around the cylinder.
LCN believes that one of the fundamental solutions that a door closer provides is control—door control to prevent personal injury and property damage. Door closers with built-in PRV claim to increase the service life in applications where the door is forced open or closed. However, PRV closer technology greatly reduces door control, and the potential effects of lost door control may result in property damage, personal injury, increased maintenance costs and liability exposure. LCN believes that these effects far outweigh the perceived benefit of increased service life. Therefore, no LCN closers contain PRV Technology.
LCN closers
Since 1876, LCN has been the undisputed innovator and leader in the door control. LCN offers a complete line of cast iron and cast aluminium door control products including heavy-duty hydraulic closers, power operators, fire/life-safety closers/ holders, high-security closers and more.
LCN products feature quality components for increased security, high performance and a long service life. These features include:
- Heavy-duty forged steel arms for increased door closer stability and control.
- Double heat-treated pinions/full complement bearings to reduce wear and leaks.
- All-weather fluid to keep closer components working smoothly.
- Fast power adjust dial allows for easy adjustments and maintenance for maximum door control.
- Products that meet or exceed ANSI/BHMA minimum industry standard cycle requirement.
- Products that meet DDA requirements.
- Fire rated with all Fire Codes
Material
Door closers are made of cast iron or cast aluminium. While cast aluminium closers can be an alternative solution for some facilities and applications with budget constraints, cast iron closers are preferred by many institutions because of the material’s compatibility with the high-grade steel components within the closer. Where closers are subject to millions of opening and closing cycles, this durability is extremely important in high-abusive, high-traffic areas.
Cast iron closers are twice as durable as cast aluminium closers, so they are a better choice for applications and buildings that have high traffic with wear and tear on the doors and hardware. Cast iron closers are designed to last for 25-30 years or the life of the building, which provides a lower total cost of ownership and minimizes the risk of malfunctioning or broken closers at a high-traffic opening.
Historically, many specifications have listed cast aluminium closers as equal to cast iron closers. However, these products do not perform the same and are not equal in quality and durability. When writing closers in to the specification, be sure to identify the best product, cast iron or cast aluminium, to meet the performance and durability requirements of the opening.
LCN cast iron closers
Heavy-duty cast iron is the strongest and most reliable cylinder material available. It features, superior burst and yield strength, as well as natural graphite that self-lubricates parts, reducing wear. The robust wear eliminates internal leaks and provides minimum porosity.
The 4000 Series is LCN’s most durable heavy-duty closer designed for the most demanding, high use and abuse applications. We built the 4040XP from the inside out, combining tougher, bolder construction with proven LCN technology. The result is a closer that’s stronger, smarter and delivers remarkable value in a variety of applications.
